Question

find the load arm
if
effort arm is 4 cm
effort is 500N
Load is 2000N
WRONG ANS REPORTED??

Answer 1

Answer:

Correct option is

B

90%

As we know that efficiency (η) =

velocity ratio

mechanical advantage

Mechanical Advantage(M.A) =

effort

load

=

1000

4500

= 4.5

Velocity Ratio(V.R) = No. of pulleys used = 5

Therefore efficiency η =

5

4.5

×100% = 90%

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Answer 2

$\bf{\underline{\underline{❥︎AnSweR:-}}}$

$\bf\fbox\red{Effort Arm / Load Arm= Load / Effort}$

$\bf{ \frac{4}{2000} = \frac{500}{Effort} }$

$\bf{4 × effort = 2000×500}$

$\bf{4 Effort = 10,00,000}$

$\bf{Effort = \frac{1000000}{4} }$

$\bf\fbox\pink{Effort = 250,000}$

$\bf\green{Mechanical Advantage = \frac{Load}{Effort}}$

$= \bf{ \frac{500}{250000} }$

$\bf\fbox\purple{=0.002}$